Coupling device



G. w. AMOR COUPLING- DEVICE July 25', 1933.

3 Sheets-Sheet 1 Filed March 14, 1931 llV VEN TOR A TTORNE Y G. W. AMOR July 25, 1933.

COUPLING nBvIcn 7 Filed larch 14, 19's;

3 Sheets-Sheet 2 VEN TOR M12 rron/15v July 25, 1933. s. w. AMOR COUPLING DEVICE Filed March 14, 1931 Fig. 3.

3 Sheets-Sheet 3 Patented-Juli) 25, 1933 Y f I 3 3 "fononeniwltniiimmen,

" oourmne r h hppli catien fiiekilnar h" 14, 19 31;Seria1-No:522; 744,'and in Great Britain April17,1930;

Tl1is invention relates to' icoupiing device's. for use inlthe'erectionof s'caffolding or: l

temporary structures of theitype compris ng 'a main body inemb'erhaving a clamping jaw integrally formed-on opposite sides thereof" the major axis of each-ofsaid jawsheing dis posed atright V angles, one to {the other, va hinged clai'nping" aw cooperat ng with eachof the first mentioned jaws and-cclamping v v abutment -9 with shall'be no loose partswhich can-"be acci'dene I tally'or otherwisedetachedtherefrom or be damaged in handling, and the object of the 'present invention is the con'strueti 7 Vice which will-fulfill these requlrements and in f ease; of "operation.

manipulation and: efliciency in:

' The invention} therefore consists "of clamping device in. which the clamping screw is not directly 'connected'jwith or car,

ried by the movable clamping j aw but 'i's'irl oreinovably mounted in' the mainbody memment of the device;

' ification;

her and positioned relatively to said movable jaw with whiohit come-Sb flllldtWVllGIl moved in one direction it permits the movable jaw to open and when moved 1n the reverse d1rectionitiiorce's the movable jaw into its clamp 'ing position. 7

The lnventlon WVlll be Iurther described with reference to the accompanying drawings, wherein Figure 1 is a side elevat on of one embodi Figure 2 is a planof Figure 1;

' Figures 3 and 4 are similar Views of a mod Figure 5 is a side ,elevationofa further 7 embodiment of the invention;

Figure 6' is a part sectionalelevation on the line 02-00 of Figure 73 Y Figure 7 is a plan view of Figure 6, and, Figure 8 is a front elevation of the hinged jaw shown in Figures 5 and 6. f

Referring more particularly to Figures 1 be supported, r

i ofa ole- "tion tothe screw head 12.

and-2, thedevice comprises amain bodymem 1 her l-having on'o'pposite'sides thereof inte-.v

grally forin'ed jaws 2 ,73, withtheir' longer axes disposed atI'i-ight' angles toeach; other,

clampingscrew'6. Clanipingja-ws'? are piva otaliy mounted, by means of hinge pins 8,in the lugs 4, said vj-aws'jbemg provldedwithian (i co-operatesr In .oper ation when it is desired to 'secure" I ja ledger poled to a'scafiold pole\1 0,- the jaws ,7 are openedout by screwing tlie'screw- 6 into which the head of the screw the lug 5 andwhen theldevice is placediin theedesired position-on thescafioldpole 10 the screw imscrewedand, theheadkof the screwilbearing against the abutment 9, effects tliesseparationwof the abutment 9' from-the 7 against the pole 10.1 W'iththe device thus 1 securedandtheotherjaw- 7 opened out the ledger" pole ll n lay be placed in position and the scribed. I I 1 a v In the niodifieationshown 1n Figures3and 7 )Closed in the; manner: above declamping screws (too-operate; v i v v Figure's 5-1t0 8 *illu'strttte a further em'bodione which embodies ch'ar'acteris'tics resulting lu'g 5 a-ndtheconsequentClamping-of the jaw 0 mentwherein the clamping screw6 is constructed with an enlarged head 12 which-is located in'a recess 13 formed in the abutment 9 of the hinged jaw 7. As will be understo'od,axial movement of thescrew 6 in either direction will cause the head'12 to coact with the upper,or'lowerfsurface of the recessf13 and move the hinged jaw 7' toward or away from the mainbody member 1.' v The sizeofthe recess 13 is such as to permit of a small angular adj ustment of the aw 7-in rela- .;n will be obvious that in' a device can? structed in accordance with this invention, the movement of the hinged jaw 7 is at all times governed and determined by the axial movement of the clamping'screw 6, andthe;

replacement of the hinged jaw 7 to the gripping position is completely and mechanically effected by rotation of the clamping screw 6.

The length of the threaded portion of the clamping screw 6 and the limit of angular movement of the hinged jaw 7 is such that the screw 6 cannot be completely unscrewed and detached from the lug 5 without removing the hinged aw 7 from the device.

WVhile the lugs 5 are preferably formed integrally with the body member 1 they may, if desired, be formed separately therefrom and be secured thereto sothat their rear faces bear hard against the outer face of the body member so as to have no independentmovement apart therefrom.

No parts of the device can become accidentally detached therefrom and the clamping screws. are housed and protected, from injury and/or displacement, by the lugs 5 and clamping jaws 7.

WVhat I claim is 1. A coupling device for use in the erection of scaffolding and like temporary structures comprising a body member composed of a pair of oppositely disposed fixed elements each forming one part of a pair of clamping devices, a pair of hinged elements forming the other parts of said pair of clamping devices co-operating with each of said fixed elements, and a. pair of headed screw elements mounted in the body member with their heads adjacent said hinged elements whereby said screws cannot be removed from 7 said body member when said device isin any positionand arranged when withdrawn from said body member to coact with and force the hinged elements into clamping position.

2. A coupling device for use in the erection of scaffolding andlike temporary structures comprising in combination a main body member, one element of a pair of clamping jaws formed integrally with and on opposite sides :of said body member, a lug on each side of said body member, a screw threaded clamping screw operating in each of said lugs,

hinge pins mounted in each of said lugs, a pair of clamping jaws pivotally mounted on said hinge pins and abutments on said clampe ing jaws with which the heads of the clamping screws co-operate, said clamping screws being so mounted in said lugs that when the coupling device is in any position, said screws cannot beremoved from said lugs.

3. A coupling device for use in the erection of scaffolding and like temporary structures comprising in combination a main body memv said arrangement of said clamping screws preventing the removal ofsaid screws when the device is in any position;

4. A coupling device comprising a body member having a pair of oppositely disposed fixed elements, each forming one part of a pair of clamping devices, a pair of hinged elementsforming the other part of said clamping devlces, an abutment on each hinged element, a pair of lugs on said body member, each positioned opposite to but spaced from an abutment on said'hinged elements, threaded clamping screws having enlarged heads, in said lugs with their heads disposed in the spaces between said lugs and abutments and adapted tocoact with said abutments to force said hinged elementsinto operative position, the disposition of said heads in said spaces preventing removal of said screwswhen said hinged elements are in any position;

GEORGE WILLIAM AMOR, 

